Couple of points hit me reading the past 50-odd posts.
Regarding water depth/E-stop etc., I think it’s a fair assumption that with the ride running the girl would’ve been out of her depth in that section anyway, so increasing the depth further by stopping the pumps won’t have made that aspect any worse. What stopping the pumps would achieve is the removal of the quite extreme currents that they create (save, in fairness, for the initial moments where the pumps empty). So, I really don’t see how any action other than e-stopping could be justified as the best immediate course of action, once the situation is known.
Regarding CCTV, it should be questioned why it wasn’t necessarily noticed that the kids were misbehaving, BUT, it should also be realised just how much an operator has to concentrate on at the same time. As well as watching cctv, they have to keep an eye on the whole turntable, ensuring loading and unloading is being completed correctly, potentially confirm with the loader that each boat is good to dispatch (don’t know what Drayton’s policies were etc), potentially control the boat turn after the lift (again don’t know the specifics of Drayton’s), maybe keep an eye on queue length and relay that to a control etc etc etc. Even if some of these are delegated, the operator still retains overall responsibility of the team.
And, on top of all that, watch maybe 15+ cctv images, potentially each only a couple of inches across depending on how big the screens are and how many are crammed into the cabin...
It doesn’t excuse it, and questions (maybe particularly over workload) should be asked... but I can see how an operator could miss a group of kids mucking about during an entire ride cycle.
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